Features: Hexagonal heads prevent rolling. Perform clamping and tight closing operations stably. Each pin vice has a reversible steel collets in each end. Used for hand drill, wire wrapping applications and beading projects. Easy to position and accurate. It is very accurate and efficient in operation. The bit is tightly gripped and can be clamped with 0.5-3.2mm drill bit. Double end drill is made of high quality white steel , which is wear-resistance and more durable in use. Package Include:2pcs x Hexagonal Double Ended Pin Vise Wire Tool The Most Sincere Service A.We are always welcome to our friendly customer support team for any product issue at our Amazon store.